Pipe joint



Marh 13, 1928.

R. HILDEBRAND PIPE JOINT Filed Nov. 27, 1922 Patented Mar. 13, 1928.

UNITED STATES PATENT oFFicE.

REINHARD HILDEBRAND, F WEBSTER GROVES, MSSO'URI, ASSIGN'OR TO FULTON i IRON WORKS COMPANY, 0F ST. LOUIS, MISSOURI, A CORPORATON OF DELAWARE.

PIPE JOINT.

Application filed November 27, 1922. Serial No. 603,617.

This invention relates to pipe joints and is illustrated herein as embodied in an expansible joint of a type in which two hollow tubes are arranged one wit-hin the other for telescopic movement with relation to each other. Tliesetubes form a continuous conduit through which a fluid may be conducted.

During the use of the telescopic joints ot the foregoing character the fluid llowing 1i) through the tubes will, in the abscence ot some preventative. means tend to escape from.

the conduit between the walls of the telescopic tubes. In view ot this fact, an important feature of the invention consists in the provision of a pipe joint ot this character which is provided with an improved means for prevent-ing the escape of the contents ot the conduit.

An important fea-ture of the invention which is conducive to the accomplishment of the recited object consists in providing the telescopic joint with a packing device coniprising a plurality of stufiing boxes, packing material surroundingthe telescopic members and held in place by means of the stuiiing boxes, and a gland associated with `the stuiffing boxes and operable to adjust simultaneously the packing material surrounding both of the telescopic members. y

These. and other features and objects of the invention will become apparent from a reading of the following specification in the light of the accompanying drawings, 1n which:

Fig. I is a vertical section illustrating a iiuid cooled piston equipped with the present invention Fig. II is an enlarged fragmentary vertical section showing an expansible conduit through which the cooling fluid is conducted and Fig. III is an enlarged detail view of the lower extremity of the conduit. As shown in Fig. I ot the drawings, cylinder 1 is' equipped with a piston 2 having a hollow fluid chamber, or head, 3 formed at its upper extremity. A plurality of conduits 4: are arranged to conduct a cooling medium to the head or chamber 3. The Cooling medium entering (Fig. III) through a supply pipe 5, flows past a control valve 29 in a chamber 7, formed in an elbow 6, and thence upwardly through a ring 14 and a pipe 13 to one of the conduits ll. The

means 'for leading t-he cooling medium away from the piston is, as shown in Fig. Il, similar to that employed in conduct-ing the tluid into the piston and for that reason like reference numerals indicate similar parts in both Figs. II and III.

The conduits or tubes l are arranged to extend downwardly into the upper extremity of the tubes 13 and to move upwardly and downwardly with the piston, during which movement the tubes 13 are maintained in a stationary position. To the end of preventing the escape of the cooling medium from between the telescoped ends of the tubes LL and 13, a gland 19 supports rigidly a tube 12 which surrounds the junction between the telescoped ends of the tubes. A stutling box 23 is tixedly maintained in the upper extremity of the tube 12 and is provided with a suitable packing material 25. A stuiiing box 26 in the form of a washer is seated upon an annular shoulder formed within the tube 13 and supports additional packing material 25. To assist in holding the packing material in place a floating gland 27 is interposed betwecn the opposite open ends of the stuiing boxes and this gland is provided with outlet openings 28 for the discharge ot water carried: into the gland upon the surface of the reciprocable tube 4;.

In the event that the packing material 25 within the stutling boxes becomes loose, thereby permitting the cooling medium to escape through the stui'ling boxes, it will be found necessary to adjust the stuffing boxes, and accordingly the gland 17 which is secured tixedly to the outer tube 12, is provided with recesses 19 for the reception ofthe tool for rotating the gland. It will be seen that such rotation causes the gland, by reason of its screw-threaded engagement with a lixed member 10, to move upwardly or downwardly, whereby the stuiiing box 23 is carried with the tube 12 upwardly or downwardly according touthe movement of the gland 17. The movement imparted to the stuiiing box 23 is transmit-ted through the packing 25 to the floating gland 27 and thence to the packing 25, and it will be seen that by virtue of such a provision rot-ary adjustment imparted to the. gland 17 causes the packing material 25 located within both of the stuting boxes to be adjusted simultaneously and uniformly by means of the oating gland 27.

As shown, the lower open extremities oi the outer tubes 12 are provided with drainage pipes l1 which conduct from the member` l() cooling medium AescapingT through the joint. Also the elbows (i. 8. are provided with drainage plugs 16 which all'ord access to the interior oi the tubes lil. llE desired the elbow S may be provided with an air colnpressifm chamber 230, which avoids extremelvV high pressure accumulating within the telescopic tubes, and with an outlet discharge pipe S.

As shown in Fig. H the upper extremityv ot' the conduit at through which water discharged 't'rom the piston is provided with a stuting box 22 and a packing 20. 21 and extended upwardly atI 4 to insure that the water within the chamber 3 will always be maintained at a desired level.

I claim:

A packing device 'for an extensible conduitj composed of telescopinfr tubes. comprising stalling boxes associated with said teleseo))iner tubes. each of said .stallingr boxes containinglr a bodsT ol packing` and means l'or simultaneously tightening the packing in the respective stulng boxes, said means includilnlr a double gland extending into both ot .said stufiing' boxes and provided with a drainzugo outlet between said stufling boxes.

In testimony that I claim the 'foregoingd l hereunto ailiX my signature.

R E INH AR D HU) l P lt ,Ik N D. 

